68kMLA Classic Interface
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| 30-pin SIMM RAM identification and testing help | |
| Posted by: jessenator on 2020-04-24 14:34:04 Greetings. I came into possession of a lot of 30-pin SIMMs, most of which are from PCs of the era. There are a handful whose stamped part numbers I was unable to ID via the google, and wondered if anyone could help decipher them.   Incidentally, is there a market for 256 KB and 512 KB modules anymore? The vast majority of my haul consists of 256 KB modules. Since I've only got an SE/30, I'll really only be able to test the quads I have, but at least I could swap them in if I know what size they are. But now that I think on it, with the plastic clips, that might not be a good idea...Do I need to risk damaging the ram holders on my SE/30 or is there another way short of purchasing a SIMM tester? | |
| Posted by: Byrd on 2020-04-24 15:58:13 Yeah those plastic clips on SE/30 are horrible, don't test RAM on using such a design for fear of snapping them. There is no market in low density, stock config RAM modules apart from keyrings 🙂 | |
Posted by: jessenator on 2020-04-24 16:12:47There is no market in low density, stock config RAM modules apart from keyrings 🙂:lol: yeah I figured as much. That's not a bad idea, actually! Maybe I could get my buddy with his 486 rig to test them for me... I think his board has metal clips. | |
| Posted by: bibilit on 2020-04-25 00:46:00 The top ones are 1 Mb units. (Either identified as 1M / or a variant of 1000) the bottom ones don’t know. 256 will go on a Plus for instance, even a Se/30 (second bank ) 512 don’t remember, never seen. | |
Posted by: jessenator on 2020-04-25 08:09:38256 will go on a Plus for instance, even a Se/30 (second bank )Sure. Maybe someone wants to restore a 4 MB model Plus back to factory. I guess it comes down to whether or not people would even want to buy them. I once wanted to do the oddball 17 MB config in my SE/30, where the an unreliable source mentions putting 256 K SIMMs in bank A (versus B ) results in faster performace? I want to say that my IIsi had some 512 K sticks in them when I got it from the original owner. Was that the "2 MB Upgrade Kit" from Apple? | |
Posted by: trag on 2020-04-25 21:38:09Sure. Maybe someone wants to restore a 4 MB model Plus back to factory. I guess it comes down to whether or not people would even want to buy them.One of the Newlife upgrades for the 512K/128K had eight SIMM sockets on board. Installed in a 512KE, the upgrade would use the 512KB on the logic board, then install a pair of 1MB SIMMs, which makes 2.5, then populate the other six slots with 256KB SIMMs, and you get 4MB. Unfortunately, the supply of Newlife upgrades is extremely limited. | |
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